Excavating mechanism.



H. H. HARRIS. EXGAVATING MECHANISM. APPLICATION FILED 111111.22, 1911.

1,002,685. Patented Sept; 5, 1911.

2 SHEETS-SHEET 1.

direetion'of operation of the engine.

To enable the same-engine and gearing to long handles .44; I proengine leads to a crank shaft on which is a pinion meshing with the gear and this gear is shown as being on a shaft 54 which has a pinion 55 meshing with a gear 56 on the shaft 57. These shafts 54 and 57- are carried by the trackway by suitable bearing brackets thereon.- On the shaft 5-7Yarea pair ofsprocket wheels 60. over vliielr'run' a pair oflsprocket chains til. 'ljhcsejrha'ins may pass over the sprocket whcels (32' carried near the forward end of the horizontal trackway, and may have their ends anchored to ears on a suitable block 66 extending up-.

' wardly from the head 30. "This is-the con:

struction shown in fulllines in- Fig. l-and enables the engine, -\\-hen'oper atejd, 't-(lfilll-fti the upper cnd-ot the short dipper arm 31 m- '40 j around-the sprocketwheel 62.

one pin. This The same cable raising mechanism is emor out along the -tra;ckwa'y,-. according to'the elevate or lower the vide sprocket wheels 67 on the shaft 4-1 and I connect such wheels with shoWnin dotted lines in'F-ig. 1. These endless chains may be a portion of the same 7 chains 61 which are shown, in *full' lines,

as anchored to the block 66' and. passing To make the change from the latter construction to that Where the chains drive the pinions 42, it is only necessary to disconnect the chains from the block 66, remove a section of chain and connect them around the wheels 67 in place of'the wheels 62. This is illustrated in the diagram of Fig. 4, wherein 61 represents- .the chain in its horizontal position and 61 the chain in its diagonal position where it passes around the wheel 67. To enable the change to be made conveniently I make suitable ones of the chain pins removable. Thisis illustrated by the pins 68 and 69, which are shown as held by cotters 70 and 71. The'removal of the cotters allows the removal of the respectivep'ins, which enablesthe corresponding portion of the chain tobe removedandthen the remaining portion' may-be connected so that the then end links 73 and 74 'arecOnnected together by will bring the chain to the 'size shown in dotted lines at 61.

long sticks 44 horizontally structure roof when these sticks are idle,

the sprocket wheels (30. by endless sprocket v chains, (31,

it is slowly anism for raising and ployed whichever dipper handle is used.

This raising mechanism is shown com prising a winding drum 80 on the swiveled superstructure and a cable 81 which passes. forwardly and u 'iwardly therefrom over a guide sheave 82 adjacent to the rear of the trackway and another guide sheave 83 near the upper end of the boom. This cable is shown as passing around a movable pulley 84 connected with the dipper and thence upwardly around the sheave 85 on the boom and downwardly to the frame of the movable pulley. This multiplication, however, may be varied, as desired.

Itis to be understood that, in practice, the dipper shown in full lines at 36 and that shown in dotted lines at 36 will be one and the same dipper and connected, as desired li0. 0lil1(l' dipper arm. There is space above 'the.superstructure for holding the over the superasxis shown in Fig. 1. Similarly, there is space .at't he inner end of the trackway for holding the short dipper handle out of the way \vhenit is idle. It will-be noticedthat the dipper 11111131 is of less diameter than the distance between the outer sides of the 'two sticks .44;- Accordingly, to aceommo- .date ell-her arn between-the guides 32 I make them ad ustable 'on the bars 33. This maybe accomplished by having transverse slots: around the (:OIIII'BQUDQ' bolts, or the,

bolts: may lie-removed and.tl1e bars set far ther back. T he angle bars and thelowcr .ba'rs of'thc trackway stand farenough apart to enable the'wider dipper arm 44 to swing conveniently between them. ingly, be seen thatto transform the machine tron.) one type of shovel to another, necessary to disconnect the bucket, more its former handle tion, connect thcibucketto the other handle and disconnect the chain and reassemble it. for the other drive 32. These changes may be quickly-and easily accomplished. It will be seen thatthe double capacity for operation provided by my invention requires little mechanism in addition to that required for either 'opera- .t1on alone.- I

Having thus described myinvention,

what I claim is A 1.- In an apparatus of the classdescribed, the combination of a dipper-or scoop, two interchangeable handles therefor, and mechloweringone handle and for shifting in and out the other handle. 2. In an apparatus of the class described, the combination of a boom, a horizontal. trackway thereon, a pinion carried by the boom, a dipper handle coacting with the pinion, a dipper handle movable in and out on the trackway, common driving mecha- It willraccordto idle pos.i-.

and adjust the guides nism for the two handles, and mechanism connecting the same with either handle.

3.-In an apparatus of the class described, the combination of a boom, a horizontal traekway carried thereby, a pinion carried by the trackwav, a dipper arm whose upper end is guided on the trackway, a dipper arm coacting with the pinion, a motor, gearing driven thereby, and a sprocket chain adapted to connect said gearing, either with the upper end of the horizontally guided dipper arm or with said pinion.

4. In a mechanism of the class described, the combination of a diagonal boom, a horizontal trackway carried thereby, an engine mounted on the boom, gearing driven thereby, a short dipper arm whose upper end is guided by the trackway, a shaft carried by the boom above the trackway, a pinion thereon, a long dipper handle coacting with said pinion, and flexible mechanism connecting the driving gearing with either the upper end of the short dipper handle or with said pinion. 1

In a mechanism of the class described, the combination, with a boom, of a horizontal trackway, a dipper handle, means for guiding its upper end in the trackway, a )fllI of sprocket chains anchored to such up per end, sprocket wheels for said chains, means for driving said sprocket wheels, a long dipperhandle, a pinion for moving the same, a pair of sprocket wheels fordriving said pinion, said sprocket wheels being located directly over the path of said chain when shifting the short dipper handle,

whereby the same driving pinions may drive the chain for either dipper handle.

6. In a mechanism of the class described, the combination of a boom composed of two members spaced apart, a shaft carried by said boom, a dipper handle operating in the space between the boom, a rackon the dipper handle, and a pinion on said shaft, a trackway secured to the inner side of the boom members and thus spaced apart, a short dipper arm, means for shifting the same in or out on the trackway, and means for swinging the long dipper handle in the space within the trackway.

7. In a mechanism of the class described, the combination of a boom having two members side by side and spaced apart, along dipper handle operating in the space between the members of the boom, said dipper handle comprising two parallel bars, a shaft carried by the boom, a'pair of pinions on said shaft meshing with a pair of racks on the long dipper handle, an arm mounted on the shaftbetween the pinions and holding -the long dipper handle to the pinions, a

horizontal lraclm'ay carried on, the inner sides of the two members of the boom and spaced apart to enable the long dipper bandie to swing between them, a short dipper (55 handle, a head for the same mounted in the trackway, and means for shifting said head in or out and for rotating the shaft carrying the pinions. f

8. Ina mechanism of the class described, the COIllblIlfltlOln Wlth a boom, of a trackwa y carried thereby and a pinion carried thereby, a short dipper arm whose upper end is movable in or out on the trackway, a long dipper arm operated by said pinion, and a guideway beneath the trackway adjustable for the different dipper arms.

9. In a mechanism of the class described, the combination, with a diagonal boom, of a horizontal traekway carried thereby and having two spaced members, a dipper arm having a head guided in said trackway, gearing at the rear of the trackway, a motor for drii-ing said gearin a shaft carried by the boom above the trackway, a dipper arm having a rack ci'igagement with a pinion on the shaft, said dipper arm beingadapted to swing in the space between the members of the trackway, and mechanism connecting said gearing with the shaft and with the head movable in the horizontal trackw'ay.

10. In a mechanism of the class described, the combination, with a diagonal boom, of a horizontal trackway carried thereby, a dip per arm having a head guided in said trackway, gearing at the rear of the trackway, a motor for driving said gearing, a shaft carried by the boom above the trackway, a dipper arm having a rack engagement with a pinion on the shaft, said dipper arm being adapted to swing in the space between the trackway, a pair of wheels on said shaft, a pair of wheels in almement therewith on the driving gearing, a pair of wheels also in alinement, therewith near the forward end of the traekway, and flexible driving mechanism adapted to connect the wheels on the driving gearing with the two wheels on the shaft or pass over the other wheels and connect with the head of the dipper arm.

11. In a mechanism of the class described, the combination, with a boom and a horizontal trackway, of two dipper handles, one movable up and down across the boom and one shiftable in and out on the tra'ckway, of driving mechanism common to both opera tions and connecting mechanism between the same and the two dipper arms respectively.

12. In a. mechanism of the class described, the combination, with a wheel truck and a superstructure swiveled thereon, of a boom carried by the superstructure, a trackway carried by the boom, a driving pinion carried by the boom, a comparatively short dip- .per arm whose upper end is guided in the trackway, a con'iparativcly long dipper arm passing through the boom and coacting with said pinion, and means-whereby said latter dipper arm may stand substantially hori- In testimony whereof, I hereunto aflix my zontally above the superstructure when ldle slgnature 1n the presence of two wltnesses. and the former dlpper arm may depend substantially idle at the rear of the t-rack- HOLLIS H? HARRIS Way, and a, dipper adapted to be inter WVitnesses:

changeably connected with either dipper C. A. WEBER,

arm. H. B. NEWTON.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. c. 

